Roger welles and r



I J l I 5 S. D. NESMITH ELECTRIC WATER HEATER Aug. 23,1927. Re. 16,716

Original Filed Feb. 11. 1924 ATTORNEYS.

Reissued' A 23, 192-7.

UNIT S T v Rs. 16,716

PATENT OFFICE.

SAMUEL D. NESMITH, or sAN DIEGO, cALIEoRNIA, ASSIGNOR PART INTEREsT To A. s. BRIDGES, J. B. osBoRN, MRS. KATHRYN osBoR J. H. BULMER, AND MRS. MARY E. NESMI'IH, LI. or sAN DIEGO, cALIEeRNIA; RoGER wELL s AND R. R. RICHARDSON, BOTH OF ,THE UNITED sTAT s NAVY; J. GALLAHAN, or GUADA- LAJARA, mEx co; GEORGE E. SCHMIDT, WALTER c. sTITT, E. E. GRANT, H. M. sAMMIs,'I AUL J. HARTLEY, AND R. c. EASOM.

ELIEUIIJIRIIFC WATER HEATER.

I My invention relates to electric-water heat.- ers, .and the objects of my 1nvent1on are First,'to provide a heater of this class which is provided with a plurality of fiat, vertical, water conducting channels positioned side by side and parallel to each' other, which are heatedby means of electric heating elements positioned contiguous to and between the adjacent water I conducting channels and in-" sulated therefrom and provided wlth water conductors communicating. with the lower and upper ends of all of said water conduct ing channels, whereby a large volume of water will pass through said channels and be quickly heated therein, second,'to provide a heater of this class in which the water 7 resistance is reduced to a mlmmum and n which a largecontlnuous uninterrupted flow.

of water passes through said heater and is rapidlyheated in its passage therethrough; third, to provide tubes for a heater Of'thIS class, the combined thickness of the separate wallsof which is approximately equal'that of the volume of' water passing therethrough; fourth, to provide a substantially instantaneous electric-water heater .of large proportionate volume and highly eflicient;"

lng elements 13, insulating material 14., terfifth, to provide a water heaterof this? class inwhichthe water flows into theheater in a horizontal channel in the lower side thereof and quickly passes through a plurality of vertically extending flat water conducting channels to the upper side, where'it communicates with a similar connecting channel,

which the water conducting channels are thoroughly insulated from the'electric heating elements, thus insuring against the electric current coming in contact. with, the

-water; seventh, to provide a' novelty con/ structed water heater of this class, and,-

eighth, to-provide an electric water heater which is very simpleand economical of construction, durable, efiicient, voluminous in flow, and which will not readily deteriorate or get outof order.'.@ 1 V 4 1 With these i-andfother objects. inview, as

Application 1926. Serial No. 108,410. 1 A

will appear hereinafter, my invention consists of certain novel features of construction, combination and arrangement of parts and portions, as:will= behereinafter described in detailand-particularly set forth in the appended claims, reference being had to the accompanying drawings and .to the characters of reference thereon, which form a part of this application, in which:

' 'Figur'e'l is afront' elevational view of my electric water heater with certain parts and Yportions thereofbroken away and in section .to'facilitate the illustration Fig. 2 1s a slmllar view thereof'in section with the section taken through 22 of Fig.

3; and

Fig. 3 isa sectional view thereof taken at right angles to that of Fig. 2 through 33 f Fig. 2.

Like characters of reference refer to similar parts and port-ions throughout the several views'of the drawings,

The water tube supportlng members 1 and 2, tie members 3, water tubes 4, heat insulating plates 5, top and bottom plates 6 and '7, studs 8, heat insulating material 9, water conductors 10 and 11, cores 12, electric heatminal posts 15, insulating plates 16, terminal connect1ngmembers17, nuts 18, casing members 19 and 20, and electric conductors 21 and 22, constitute the. principal parts and portlons of my, water heater structure.

members 1 and 20f my water heater are identical in construction, but positioned in reverse order, and are supported in spaced relation with each other at their ends by means of the tie members 3. Extending vertically between the members '1 and 2 are the water tubes 4, extending through said members and welded or riveted over at their projecting ends. These water tubes 4 are preferably made of flattened copper tubing oflarge diameter or of other material of high. heat conductivity, so that a very thin channel-for the passage of the water is formed. The outer faces. of the members 1 The horizontal water tube. supportingand 2 are provided with channels 1 and 2, which extend horizontally along the top and bottom sides of the heater between the members 1 and 2 and the members 5, thus providing continuous water conducting means, or headers, communicating with the the heat insulating plates 5 and-'the members-1 and 2, as well as the members 3, are secured-relatively to each other by means of the studs 8 and the nuts 8. Between the side" water tubes 4 and the tie members 3 is provided'heating insulating material 9.

Secured in the one end of the upper plate 6 is the water outlet conductor 10 communicating with the channel 1 at one endg-and positioned and secured in the corresponding "end of the bottom plate-7 is the water conductor 11, communicating with the water cond'ucting'channel 2 in the opposite lower side of the heater, substantially as shown in Fig. 2 of the drawings. Each of the electric heating units of my water heater consistsjof an'electric'heating element 13 wound around a core 12 of in-' sulat-ing material and molded in a casing 14 of heat conducting vand electric insulating material, preferably alundum; The heating units, which are independently removable from the heater, are placed between adjacent tubes, substantially filling these'spaces so as to prevent, as far as possible, the formation, to a detrimental degree, of air spaces between the tubes and the unit s. At the ends of the heating elements 13 are provided the outwardly, extending terminal posts 15, which extend through the molded casing 14 and-an insulating plate 16, one of which is positioned at the front and another at the back side of the heater, The terminal posts 15'of each unit are connected with the corresponding posts of the adjacent and separately positioned heating elements by means of the'connecting members 17 and thenuts" 18, as illustrated in the drawings. f The water heater is'preferably enclosed by means of asectional casing consisting ofthe members 19. and 20. To the frontside of' the casing member 19 extend the conductors 21 and 22, which'conductors are preferably connected with theheating unit positioned at the opposite side of. the heaterj It is obvious from this construction, as

illustrated in the drawings and disclosed-inthe foregoing specification, that there is provided an electric water heater as aimed at and set forth in the objects vof the invention,

and though I have shown and described a particular construction, combination and arrangement of parts and portions, I do not wish to be limited to this particular con struction, combination and arrangement, but desire to lnclude in the scope of my'lncvention the construction, 'combinationand arrangement substantially, as set forth in the appended claims. Having thus described my invention,what I claim as new and desire to sec-ure by Letters Patent,

bination of a plurality of vertically extending open ended flattened water tubes, a sup.-

porting channel member at each end of said I tubes, provided with openings for 'thepasr' -7 1. In an electric water heater, the comsage of water therethrough, said openingslying abreast of the openings in said tubes,

a cover plate for said channel members to provide contlnuous water passageways across the ends of all of said tubes to thereby connect '1 the said, tubes in multiple, spacing members-interposed between said supporting members, and means forremovably attach ing. the'cover plate, supporting members and spacing members to each other to provide a unitary structure.

2. In anlelectric water heater, the com- .bination;of a plurality of open ended fiattened water tubes, independently removable electrical heating elements-"interposed be tween-and located adjacent to said tubes" and electrically insulated therefrom, supporting channel members extending across the-ends of said tubes, said supporting channel members being provided with'openings communicating with the water passageways in said tubes, a cover plate for each of said supporting'channel members for sealing the same and providing water passageways across the ends of all of said tubes, whereby saidtubes are connected in multiple, and water. inlet means opening into one of said water passageways, the "lower ends of said tubes and water outlet means opening into the other water passageway at the upper ends of said tubes.

3. In anelectric Water heater, the combination of horizontally extending tube supportingnmembers, flattened water tubes independently attached to said supportingmembers, said supporting members being channeledand provided with openingsthere= in to communicate with the water passageways'in said ti1bes,a cover plate forsaid supportlng channel members providing continuous passageways-along each end of said tubes to thereby connectisaid tubes in multiple, spacing members extending between said supporting members at the outer side of the endnwaterwtube of saidiseries of tubes,

means for removably attaching said cover plates, supporting channel members and said spacing members to each other, heat insulating means between said tubes and said spacing members and cover members removable electrical heating elements located between and adjacent said tubes, and heat conducting electrical insulating means interposed between each of said heating elements and said tubes and encasing the heating ele- 10 ments.

In testimony whereof, I have afiixed my signature hereto.

SAMUEL D. NESMITH. 

